Method for dyeing blended fiber materials of cellulose fiber and amide nitrogen-containing fiber with mono- and di-functional reactive dyes

Abstract

A blended fiber material of cellulose fiber and nitrogen-containing fiber is dyed by a one-bath one-step dyeing method, which comprises contacting the material with a dye bath containing both a reactive dye having two or more fiber-reactive groups different from each other and a reactive dye having one fiber reactive dye, whereby a dyed product having an excellent wet fastness is obtained even in a single manner.

What is claimed is: 
     
       1. A method for dyeing a blended fiber material made up of cellulose fiber and nitrogen-containing fiber selected from the group consisting of natural nitrogen-containing fibers and synthetic polyamide fibers, which comprises contacting the material with a dye bath containing a reactive dye having two or more fiber-reactive groups different from each other and a reactive dye having one fiber-reactive group, whereby the material can be dyed by a one-bath, one-step method. 
     
     
       2. The method according to claim 1, wherein the reactive dye having two or more fiber-reactive groups different from each other comprises a single reactive dye selected from the group consisting of reactive dyes having, as the fiber-reactive groups, one vinylsulfone type reactive group and one monohalotriazinyl group, one vinylsulfone type reactive group and one dihalotriazinyl group, one vinylsulfone type reactive group and two monohalotriazinyl groups, two vinylsulfone type reactive groups and two monohalotriazinyl groups, one monohalotriazinyl group and one dihalotriazinyl group, one dihalotriazinyl group and one dihalopyrimidinyl group, one monohalotriazinyl group and one trihalopyrimidinyl group, or one monochlorotriazinyl group and one monofluorortriazinyl group. 
     
     
       3. The method according to claim 1, wherein the reactive dye having two or more fiber-reactive groups different from each other is selected from the group consisting of reactive dyes represented by the formulas (I) and (II), ##STR6## wherein D is an organic dye residue; R 1 , R 2 , R 3 , and R 4  are independently hydrogen or alkyl; R 5  is hydrogen, halogen, or phenyl unsubstituted or substituted with at least one member selected from the group consisting of halogen, hydroxy, alkoxy, alkyl, phenyl, amino and sulfo; Z 1  and Z 2  are independently hydrogen, alkyl, alkoxy, carboxyl or sulfo; X is halogen; and Y is a vinyl group or --CH 2  CH 2  OZ in which Z is a basic acid residue. 
     
     
       4. The method according to claim 1, wherein the reactive dye having one fiber-reactive group comprises a reactive dye having a single fiber-reactive group selected from the group consisting of vinylsulfone, monohalotriazinyl, dihalotriazinyl, trihalopyrimidinyl, methylsulfonylhalomethylpyrimidinyl and dihaloquinoxalinyl. 
     
     
       5. The method according to claim 1, wherein the reactive dye having one fiber-reactive group is represented by the formula (III),   D'--SO.sub.2 Y                                             (III)     wherein D' is an organic dye residue having a sulfo group and Y is a vinyl group or --CH 2  CH 2  OZ in which Z is a basic acid residue.   
     
     
       6. The method according to claim 1, wherein the contacting is carried out in the presence of an alkali and an inorganic salt. 
     
     
       7. The method according to claim 6, wherein the alkali is at least one member selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal phosphates, alkali metal acetates, alkali metal borates, alkali metal perborates and organic bases. 
     
     
       8. The method according to claim 6, wherein the inorganic salt is one member selected from the group consisting of sodium sulfate and sodium chloride. 
     
     
       9. The method according to claim 1, wherein the contacting is carried out at a temperature of 40° to 80° C. 
     
     
       10. The method according to claim 2, wherein said reactive dye having two or more fiber-reactive groups is: ##STR7## 
     
     
       11. The method according to claim 2, wherein said reactive dye having two or more fiber-reactive groups is: ##STR8## 
     
     
       12. The method according to claim 2, wherein said reactive dye having two or more fiber-reactive groups is: ##STR9## 
     
     
       13. The method according to claim 5, wherein said reactive dye having one fiber-reactive group is: ##STR10## 
     
     
       14. The method according to claim 5, wherein said reactive dye having one fiber-reactive group is: ##STR11## 
     
     
       15. The method according to claim 5, wherein said reactive dye having one fiber-reactive group is: ##STR12##